ACE EPAM: Daily-Averaged Energetic Particle Fluxes from Spacecraft

An ensemble of 26 data sets of daily-averaged, background-corrected energetic particle fluxes from the ACE spacecraft's EPAM instrument. The data includes fluxes for protons, electrons, and ions across multiple energy ranges and bins, measured in different reference frames and telescope apertures. The data is provided by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Modeling solar wind dynamics based on particle fluxes in the solar wind rest frame.
• Analyzing energetic particle anisotropy based on spin-sectored flux measurements.
• Studying particle energy spectra based on data partitioned into 10-25 energy bins.
• Correlating space weather events with background-corrected daily-averaged fluxes.

Strengths

• Contains 26 distinct, individually described data sets for cross-analysis.
• Provides particle fluxes across multiple energy ranges (e.g., ~63-4430 keV protons).
• Includes data in both spacecraft and solar wind rest frames for different analytical contexts.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect temporal or instrumental bias inherent to the single spacecraft source.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Data gathered by the ACE spacecraft's Electron Proton Alpha Monitor (EPAM) instrument.

Time Range

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Freshness

Last updated 2026-03-13 04:41:46.011327; freshness should be verified.

Geography

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